When is it recommended to use a dictionary data structure?

A data structure in the form of a dictionary (dictionary, map) is recommended when you need to efficiently store and quickly search for data by key.

Examples of use:

• Fast access to values by a unique identifier (e.g., user by ID).
• Storing settings or parameters, where the key is the parameter name, and the value is its value.
• Caching data to speed up repeated requests.

A dictionary provides access to elements in amortized O(1) time, which is significantly faster than searching in a list.